Do you need to design a logo for your brand?
Or you need to build a website to expand your business activity online?
Or you need to build a mobile application?
Or you need to write new content for your blog?
You can spend time and do this yourself even when you do not have needed skills and knowledge, and you can hire a new employee that has needed skills...
Or, instead, find and hire a freelance expert with relevant expertise to do this for you!
Spend time on core business, and focus on things which really matters. Outsource non-core operation to an external professional who specializes in that activity and does such things every day.
Every entrepreneur knows how business works: you (as a manager) fully think out and work through the process, prepare instruction for an employee, and delegate the process (or task) to the employee to execute, after then supervise the quality of results.
Outsourcing of non-core operations is pretty similar: you define and describe what task the external professional should do, provide him requirement document that describes scope and features of the task, answer the questions if they ask, and supervise the task completion.
Using freelancers can be cheaper compared to full-time employees. Even with a limited budget, you can easily effort experienced professional for short-term tasks that require specific skills that your employees do not have.